Means for supporting nailing strips



Aug. 2s, 1923. I

` N. F. AMBURSEN MEANS FOR SUPPORTING -NAILING STRIPS Filed 0st. '7, 1919 EL ze? IN NT R BYl Patented ng. Z8, 1923,

i siren' saintes,

VNilis r. AMBnnsnN, or rrrrsisnnsn, PENNSYLVANIA, assreNon COMPANY, A conrosnrzon os Miessiicnusnrrs.

Qro Uni-renie y MEANS Fon'sUPronTrNo NAILING STRIPS.

Appntion inea catcher 'zieief serial N. 329,065. l

To all whom it may concern? Be it known thatl I, NiLs F. AMBURSEN, a citizen `of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, 'have invented certain new and tuseful Improvements in Means forl Supporting -Nailing Strips, of which the following is a specification..

This invention relates to means for supporting nailing strips on concrete floors'and e the like. Heretofore, in concrete worlnthe nailing strips for thel flooring have been embedded directly in the concrete itself, or embedded in what is' termed a cinderconcrete lill poured onftop of the concrete. Among the disadvantages encountered in such' arrangement, thel most serious is that the wooden nailing strips swell, displacing the adjacent plastic materialV and afterwards shrink, becoming loosev in the concrete. The strips are not anchored securely in place and when the flooring is laid, itin turn is not properly anchored and very frequently becomesseriously damaged, if not totally ruined by the absorption oimoisture from the concrete or from the concrete and the cinder filL-in which connection it is to be notedthat there. is suilicient moisture to cause warping and distortion even though vthe `floor be laid some weeks atteithe concrete has been poured. Furthermore, in addition to the expenseinvolved in.- laying the extra depth of concrete or cinder Afill, it' is necessary to prepare thenailing stripsby beveling4 the sides olf. i l

AOne of the primary objects of my invention is the provision of improved means for Supporting and anchoring the nailing strips whereby the expenses andthe disadvantages incident to the foregoing lpractice are Obviated.

Another'obj'e'ct of the invention resides .v

inthe utilization of certain parts of the mold structure as a means for .securing the anchors. A y Y Still another object of the invention resides inthe provision Vof an improved anchoringr-mean's so constructed that the nailing Ystrips be 'securely drawn home against the concrete under tension.V

The -foregoing,together with such other objects as may hereinafter appearor are incident to my invention I obtain by means of a construction, the preferred embodi ment of whichl have illustrated -Ic-.oinpanying drawings, wherein VFigure lis a cross'section through av joist floor, with the forms in position, illustrating"`V one embodiment of ymyinveinLion; 'Figure is a cross section taken on the lin'ef2-2'of Figure 1;' F igure' is asection correspond# ing to Figure 1, illustrating a nio'dificationl' ofinyjinvention; Figured isa cross section taken ontlie line 4i-i4 of igure,v Figure 5 is a section similar to Figuresv 1 and 3,11-

lustrating still another modification of my inventionghand Figure 6 is a crossse'cti'on taken onlthe line 6-6 of F igure 5. Referring Vnow to Figures 1 and 2., it will beseenthatthe loon slab 7 andthe joist 8 are formed by means of the pains 9, the lower ends of which are supportedfbyy the longitudinally extending supportiiigmembers 10,

the members 10 in lturn being supported frorn-v the false work, in any preferred manner,as is well understood in this art.

` In order to properly positionthesides of the jpans with reference to the supporting members 10, I provide; a plurality of lsuitably .spacedspreaders11. Thespreaders are j positioned by means of the bolts 1 2andnuts 13, and in addition to serving as'meansjfor properly l supportin the [sides :of the vpans they-serve as means Afor supporting the lreinforcing 14. In carrying out my 'invention 'utilize the bolts' 12 andv nuts 13 as the vmeans for securing-'the anchors for the yfloory ing nailing strips 15. A's'shownjcin Figures 1 and 2 these anchors are in theformfof `yokes or strapsflG, thebase of'eachf` of "which is'adapted torfest uponaspreaderv 11 kand is apertured to receive the bolts 12. The Y 'free ends of theyokes oi.l straps project fup,-

wardly-,above thelevel of the concrete as 1ndicated in dotted lines, in Figure 2. 'After the parts have been assembled and positioned as described, the concrete is poured and the nailing stripsare pl aced in position by'in'sertingl them between the up. Y wardlyprojeoting free endslof L.the yokesl1`6 a' few .daysafter the pouring. Thenajling strii'js arer then leveled up required by wedging or., filling in and they are drawn Vh ox'ne tightly by bending over the free:lends rvor" the yokes, "one ata time, with a suitable tool which grips the lend'of the yoke legi and atL the same time bears downwardly/.against 'the nailing strip when a bending pressure is exerted` While the parts are thus under tension nails 16 are driven into the sides of the yoke leg andaiiterwards the Jfree ends are bent and hammered down and the nails 17 Vdriven in.

- It will be seenY from the foregoing that this arrangement provides a very simple means. for securely anchoringV nailing strips in position under tension so that whenV the flooring is laidlater on it will be securely anchored in turn, and that even it'V it should be affected by the moisture re-V maining in the concrete at such time, and

swell, it will return to proper position when dry.

lfurthermadvantage incident to theY ar- Y rangementl isthat I am enabled to reduce the numberof parts required to lmini- Vmum by utilizing the spreaders and the bolts 12 as a means for securing the yoles 16. In this connection, it is to be noted that upon the removal ofthe bolts 12 to take down the membersV 10 and the pans v9, the

be seenV that; the same fundamental princi- 'to assemble.

In v'order to still further expedite rthe `operations and cut down the expense in-l volved in delay, I 'have provided a conspreadersV 11 and the nuts 13 Will `remain in the concrete and the lattermay'be used as a means Jfor supporting hangers for ceiling orV other members to be supported, the

hangers having threaded ends adaptedV to screwrv into the vnuts 13. Y s. Y

Referring now to Figures Band iit will ple is involved, although the specific form ofl the anchoring means is different from that described.A In thisY case the anchoring' means comprises the Vthreaded rods 19 which are turned into special nuts 2O Which'are substituted for the nuts 13 employed in the construction shown in lFigures 1V and 2.

The mold parts are assembled as be'tore described, the rods, 19 are screwed into the nuts 20, after Which the concrete is poured.

VThe nailing strips 15, which in this case are aperturedat suitable intervals to receive the rods 19', are laid and are clamped in `position by means vof the nuts Y21,'the. naillng stripsv being countersunk or counterbored so that the ends ofthe rods 19 and the nuts 21 Will lie below the upper surface thereof. After a suitable interval 'thefloon ing 18 isrlaid and securely anchored throughv lthe medium of. thev construction just decribed. This construction in addition to the advantages notedV in connection -with that shown inl Figures 1 and 2 is very simple struction fshown in Figures 5 and 6 bym'eans ot which I am enabled vto place the nailing strips 15V inf position either before Vthe conv crete is poured or While the concrete is still 'fresh andi in a soft condition. To Ythis endl provide a spacing member foreach bolt 19, preferably inthe formfot la sleeve 22 which is slipped over the rod and rests on the nuts 2O for example, theV upper ends of thesleeve being flush with the concrete. By this'arrangement the nailing strips 15 are supported independently of the concrete and anchored as ybetere,"which, maires it possibleto placethe same in position before Vthe concrete has beenpoured orwhile it is still soft.V 'f desired a spacing means, such as the sleeve 23 may be interposed betweenthe spreaders 11 and the channels 10. i

1. 1n concrete structure and the like,'the combination with a concrete member anda spreader 'for spacing apart the vpans used to form said Vmemberembedded therein, of anl anchor for nailing strip above the spreader engaging,r and 'definitely positioned by said'spreader. and embedded 1n the concrete.v v

like including `pans,-"a spreader ,intermediate the pans adapted 1to spaceY the pans` apart, means for supporting said spreader, andan anchor for at nailing 4strip above the? lspreader engaging saidfsupporting means.Vv

3. In apparatus for 'molding concrete structures, the combination with. a plurality et spaced pans, vand fineans for.l closing thek 'space between 'panse' at the bottom; otaVV sprcaderfor spacing the pansk adapted Vto be embedded in the concrete, and means in-V cluding an anchord'or a nailing strip coacting with said closing means and said spreads the spreader and said closing meansand adapted to be embedded in the concrete.r

V2. rlhe combi-nation offa mold means for Y .constructing concrete structures and the nov 5.-.111 apparatus for moldingfconcrete Y' structures, the con'ibinatio'noii a pl uraliiy ot Y spaced pans, 'a spreader for spacing the pans adapted to be embedded in the concrete, achannel for closing 'the space between pans, and a nailing strip anchor passing through the spreader and the channel and adapted to position the spreader fand to remain inthe concrete. f

6. ln apparatus `for 'molding concrete structures, the combination otra pluralitjfot spaced pans,a spreader for spacing the pans adapted to Vbe `embedded in theiconcrete, a

.channeltor closingthe space between pans, and a nailing strip anchorpassing through `the spreader and they channel andV adapted to'position the spreader .and to remain in "the concrete,"said` anchor'having a head engaging the channel. s

'pans adapted to he embedded in the concrete,

means for Closing the'spaee between pans, a nalhng Strlp anchor passmg through the spreader and said closing meansyand tubular meansebout the anchor1 for spacing the nailing strip with referenceo the Spreader, ac'lapted tofhe embedded in the Concrete.. 10

In testimony whereof I have hereunto signed my Ila-me.

'NILS F. AMBURSEN. 

